There are two issues with cameras right now. First, the cameras stop panning if you get too far from them. I may need to turn off the panning and just increase the horizontal FOV. Second, if you do not turn off the new occlusion setting in the video menu, then objects will get culled out of view when those objects are more than 8-10 blocks away (except for trees and a few other things).
You could never see more than your arms and weapons on a added camera. That is why I dont release working mirrors.
Without adding code Im not sure if we can fix the second issue. I left it A17 only until we decide if those things are manageable for A18.